package com.itheima.test8;

public class StringDemo7 {
    public static void main(String[] args) {
        int[] arr={1,2,3};
        String str=arrToString(arr);
        System.out.println(str);
    }
    public static String arrToString(int[] arr){
        if(arr==null){
            return "";
        }
        if(arr.length==0){
            return "[]";
        }
        String result="[";
        for(int i=0;i<arr.length;i++){
            if(i==arr.length-1){
                result=result+arr[i];
            }else{
                result=result+arr[i]+", ";
            }
        }
        result=result+"]";
        return result;
    }
}
